I have been reading this post with interest as I think I'm from the same continent as @Truth25
Olive oil has been unaffordable here for a long time. It has gone up somewhat, along with most things, and a general average price for a 1l of extra Virgin olive oil converted is around 12 pounds. Some are even more. This is for an Italian import, but the local brands are similarly priced. Most people do and have just used a blend which is a lot cheaper.
The same with butter. I have only had Kerrygold if it's been offered while eating out, but just unaffordable to your average household. Even locally produced butter is about (converted) 4 pounds for 500g.
These are considered luxuries and not on most people's general shopping list.
We do get cheaper fruit and veg and that is because we grow it here. And we get grade B of them as grade A is mostly exported or only sold in the more expensive supermarkets. But these have all gone up a lot for us too, as we have had bizarre weather which has affected crops. We have gone from drought to floods and all sorts in between which of course pushes up the price for everyone.
But we also have had above average inflation, fuel is up, electricity is up etc. Which all affect the end user.
I assume the pp buys their weekly shop cheaper as perhaps it's only in season items. Real genuine basics that make up meals, but take time.
I do read here often about people complaining they went to the shops and couldn't find berries, strawberries, oranges. These are very seasonal. We would not even consider them them out of season and they aren't really available then either. Like now for eg. The poster who says squeeze your own oranges. We can't even get oranges now. It's summer here and they are a winter fruit. Those that are available have had a storage cost, which is shown in the price.
It seems that people are finding it more difficult to adjust as you are used to having most things available all the time. Which is great, but now the cost of that can't be absorbed as much. And as such is being filtered through.
I really don't think there is anything wrong with beans on toast as a general meal. But I also think social media and keyboard warrior experts make people believe that it is not, and that every meal needs to include hummus and 7 types of nuts and seeds.
It's difficult to change habits though, but unfortunately I do think its going to be necessary for many.